2020 GMC Sierra 3500HD X31 Off-road 8ft box

4-Wheel Disc Brakes

Steel Wheels

Tires - Front All-Terrain

Tires - Rear All-Terrain

Conventional Spare Tire

AM/FM Stereo

Smart Device Integration

Split Bench Seat

Vinyl Seats

Pass-Through Rear Seat

Rear Bench Seat

Floor Mats

Adjustable Steering Wheel

Power Door Locks

Power Outlet

A/C

Traction Control

Stability Control

Driver Air Bag

Passenger Air Bag

Front Side Air Bag

Front Head Air Bag

Rear Head Air Bag

Passenger Air Bag Sensor

Back-Up Camera

Driver Restriction Features

Tire Pressure Monitor

Exterior Temperature Display located in radio display

Floor covering, rubberized-vinyl (Not available with LPO floor liners.)

Instrument cluster, 6-gauge cluster featuring speedometer, fuel level, engine temperature, tachometer, voltage and oil pressure

Mirror, inside rearview, manual tilt

Power outlet, front auxiliary, 12-volt

Seat adjuster, driver 4-way manual

Seat adjuster, passenger 4-way manual

Seat trim, Vinyl

Seat, rear 60/40 folding bench (folds up), 3-passenger (includes child seat top tether anchor) (Not available with Regular Cab model.)

Seats, front 40/20/40 split-bench (no storage)

Steering column, Tilt-Wheel, manual with wheel locking security feature

Steering wheel, urethane

USB port, located on instrument panel

Window, power front, drivers express up/down (Standard on Crew Cab and Double Cab. On Regular Cab, included and only available with (PCI) Convenience Package.) (Standard on Crew Cab and Double Cab. On Regular Cab, included and only available with (PCI) Convenience Package or (ZLQ) Fleet Convenience Package.)

Window, power front, passenger express down (Standard on Crew Cab and Double Cab. On Regular Cab, included and only available with (PCI) Convenience Package.) (Standard on Crew Cab and Double Cab. On Regular Cab, included and only available with (PCI) Convenience Package or (ZLQ) Fleet Convenience Package.)

Windows, power rear, express down (Not available on Regular Cab models.)

Headlamps, LED reflector with incandescent turn signals and LED signature Daytime Running Lamps

Lamps, cargo area, cab mounted integrated with center high mount stop lamp, with switch in bank on left side of steering wheel

Mirrors, outside high-visibility vertical trailering lower convex mirrors, manual-folding/extending (extends 3.31" [84.25mm]), molded in Black

Moldings, beltline, Black

Single Rear Wheels

Tailgate and bed rail protection caps, top (Deleted with (ZW9) pickup bed delete.)

Tailgate, gate function manual, no lift assist (Deleted with (ZW9) pickup bed delete.)

Tailgate, locking, utilizes same key as ignition and door (Deleted with (ZW9) pickup bed delete.)

Tailgate, standard (Deleted with (ZW9) pickup bed delete.)

Taillamps, LED tail and SRW are incandescent stop, turn and reverse light and DRW are LED stop, turn and reverse light

Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door (Deleted with (ZW9) pickup bed delete.)

Tire, spare LT275/70R18 all-terrain, blackwall (Included and only available with (QF6) LT275/70R18E all-terrain, blackwall tires with (E63) pickup bed single rear wheel models. Available to order when (ZW9) pickup bed delete and (QF6) LT275/70R18E all-terrain, blackwall tires are ordered with single rear wheel models.)

Tires, LT275/70R18E all-terrain, blackwall (Requires single rear wheels.)

Wheels, 18" (45.7 cm) painted steel, Silver, 8-spoke (Requires single rear wheels.)

Cooling, external engine oil cooler

Differential, heavy-duty locking rear

Engine, 6.6L V8 with Direct Injection and Variable Valve Timing, gasoline (401 hp [299 kW] @ 5200 rpm, 464 lb-ft of torque [629 N-m] @ 4000 rpm)

Four wheel drive

Frame, fully-boxed, hydroformed front section and a fully-boxed stamped rear section

Pickup bed includes bed assist step (Deleted when (ZW9) pickup bed delete is ordered.)

Rear axle, 3.73 ratio (Requires (L8T) 6.6L V8 gas engine.)

Recovery hooks, front, frame-mounted, Black

Steering, Recirculating ball with smart flow power steering system

Suspension Package (Not available with (X31) Off-Road Package.)

Transfer case, two-speed electronic shift with push button controls (Requires 4WD models.)

Transmission, 6-speed automatic, heavy-duty